/*
 * contrib/pgcrypto/rijndael.h
 *
 *    $OpenBSD: rijndael.h,v 1.3 2001/05/09 23:01:32 markus Exp $ */

/* This is an independent implementation of the encryption algorithm:    */
/*                                                                        */
/*           RIJNDAEL by Joan Daemen and Vincent Rijmen                    */
/*                                                                        */
/* which is a candidate algorithm in the Advanced Encryption Standard    */
/* programme of the US National Institute of Standards and Technology.  */
/*                                                                        */
/* Copyright in this implementation is held by Dr B R Gladman but I        */
/* hereby give permission for its free direct or derivative use subject */
/* to acknowledgment of its origin and compliance with any conditions    */
/* that the originators of the algorithm place on its exploitation.     */
/*                                                                        */
/* Dr Brian Gladman (gladman@seven77.demon.co.uk) 14th January 1999        */

#ifndef _RIJNDAEL_H_
#define _RIJNDAEL_H_

/* 1. Standard types for AES cryptography source code                */

typedef uint8 u1byte;            /* an 8 bit unsigned character type */
typedef uint16 u2byte;            /* a 16 bit unsigned integer type    */
typedef uint32 u4byte;            /* a 32 bit unsigned integer type    */

typedef int8 s1byte;            /* an 8 bit signed character type    */
typedef int16 s2byte;            /* a 16 bit signed integer type        */
typedef int32 s4byte;            /* a 32 bit signed integer type        */

typedef struct _rijndael_ctx
{
    u4byte        k_len;
    int            decrypt;
    u4byte        e_key[64];
    u4byte        d_key[64];
} rijndael_ctx;


/* 2. Standard interface for AES cryptographic routines                */

/* These are all based on 32 bit unsigned values and will therefore */
/* require endian conversions for big-endian architectures            */

rijndael_ctx *rijndael_set_key(rijndael_ctx *, const u4byte *, const u4byte, int);
void        rijndael_encrypt(rijndael_ctx *, const u4byte *, u4byte *);
void        rijndael_decrypt(rijndael_ctx *, const u4byte *, u4byte *);

/* conventional interface */

void        aes_set_key(rijndael_ctx *ctx, const uint8 *key, unsigned keybits, int enc);
void        aes_ecb_encrypt(rijndael_ctx *ctx, uint8 *data, unsigned len);
void        aes_ecb_decrypt(rijndael_ctx *ctx, uint8 *data, unsigned len);
void        aes_cbc_encrypt(rijndael_ctx *ctx, uint8 *iva, uint8 *data, unsigned len);
void        aes_cbc_decrypt(rijndael_ctx *ctx, uint8 *iva, uint8 *data, unsigned len);

#endif                            /* _RIJNDAEL_H_ */
